/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package pl.droidsonroids.gif;

class ConditionVariable
{
    private volatile boolean mCondition;

    synchronized void set(boolean state){
        if (state)
            open();
        else
            close();
    }

    synchronized void open()
    {
            boolean old = mCondition;
            mCondition = true;
            if (!old) {
                this.notify();
            }
    }

    synchronized void close()
    {
            mCondition = false;
    }

    synchronized  void block() throws InterruptedException {
            while (!mCondition) {
                    this.wait();
            }
    }
}